Solar light utilization apparatus and solar light utilization system

Abstract

Provided is a solar collector that captures and utilizes solar energy and includes a plurality of vacuum tubes which are disposed by extending horizontally and are disposed parallel to each other with a predetermined distance; and a reflection plate having a substantially planar shape, which reflects solar light on an opposite side of the sun with respect to the plurality of vacuum tubes, in which the reflection plate includes a reflection surface having a serrated section at a corresponding position between vacuum tubes adjacent to each other, and in the reflection surface, one face of a serration forms a first reflection surface that reflects the solar light to the vacuum tube on a lower side among the vacuum tubes adjacent to each other.

What is claimed is: 
     
       1. A solar light utilization apparatus that captures and utilizes solar energy, comprising:
 a plurality of solar light utilization devices which extend horizontally and are arranged parallel to each other with a predetermined distance; and 
 a reflection plate having a substantially planar shape, which is provided on an opposite side of the sun with respect to the plurality of solar light utilization devices and reflects solar light, wherein 
 the reflection plate includes a reflection surface having a serrated section at a corresponding position between solar light utilization devices adjacent to each other and also having a planar reflection surface at a portion corresponding to a back side of the solar light utilization devices, 
 in the reflection surface, one face of a serration forms a first reflection surface that reflects the solar light to one of the solar light utilization devices adjacent to each other, and 
 the reflection plate includes a first non-serrated section and a second non-serrated section, the serrated section is located between and abuts each of the first and second non-serrated sections, and each of the first and second non-serrated sections opposes a respective one of the solar light utilization devices. 
 
     
     
       2. The solar light utilization apparatus according to  claim 1 , wherein
 in the reflection surface, the other face of the serration forms a second reflection surface that reflects the solar light to the other one of the solar light utilization devices adjacent to each other. 
 
     
     
       3. The solar light utilization apparatus according to  claim 1 , wherein
 the reflection plate includes a first transparent member in which one surface has serrated in section and the other surface is planar, in which the reflection surface is formed on a side of the one surface of the first transparent member and the other surface to be planar of the first transparent member is disposed, facing a side of the plurality of solar light utilization devices. 
 
     
     
       4. The solar light utilization apparatus according to  claim 3 , wherein
 the reflection plate further includes a second transparent member in which one surface has a shape matching the reflection surface having the serrated section to be provided on the reflection surface, the other surface is planar, a refractive index is the same as the first transparent member, and the reflection surface transmits a predetermined amount of visible light. 
 
     
     
       5. The solar light utilization apparatus according to  claim 1 , wherein
 the reflection surface is formed in a fine pattern in which, in one tooth of the serrated section, a length in a direction orthogonal to a parallel direction which is a plane direction of the reflection plate is a micron order or a nano order. 
 
     
     
       6. A solar light utilization system comprising:
 the solar light utilization apparatus which captures solar energy to heat an object to be heated, the solar light utilization apparatus comprising: 
 a plurality of solar light utilization devices which extend horizontally and are arranged parallel to each other with a predetermined distance; and 
 a reflection plate having a substantially planar shape, which is provided on an opposite side of the sun with respect to the plurality of solar light utilization devices and reflects solar light, wherein 
 the reflection plate includes a reflection surface having a serrated section at a corresponding position between solar light utilization devices adjacent to each other and also having a planar reflection surface at a portion corresponding to a back side of the solar light utilization devices, 
 in the reflection surface, one face of a serration forms a first reflection surface that reflects the solar light to one of the solar light utilization devices adjacent to each other, wherein 
 the reflection plate includes a first transparent member in which one surface has serrated in section and the other surface is planar, in which the reflection surface is formed on a side of the one surface of the first transparent member and the other surface to be planar of the first transparent member is disposed, facing a side of the plurality of solar light utilization devices, and wherein 
 the reflection plate further includes a second transparent member in which one surface has a shape matching the reflection surface having the serrated section to be provided on the reflection surface, the other surface is planar, a refractive index is the same as the first transparent member, and the reflection surface transmits a predetermined amount of visible light; and 
 a multilayer heat insulation unit formed by using the reflection plate of the solar light utilization apparatus and a transparent plate material, and wherein 
 the reflection plate is subjected to far-infrared cut processing on a side of the transparent plate material so that all absorbance or emissivity and transmissivity of far infrared rays in at least a wavelength of 9 μm to 10 μm are 20% or less.